Hello there

I have a 2009 a8 3.0 tdi quattro and I have a broken plastic T piece that is connected to a pipe that comes from the expansion bottle from the T piece has the word RAY stamped on it nothing else I can provide pic if required 

Regards karl

Hello Karl,

Thanks for joining, and welcome. 
Where have you tried to obtain the part? 
A main dealer should be able to supply this part, but I would suggest taking the part along together with a photo of its location on the car. I would certainly do this via. a visit, rather than over the phone. 
Other options:- EBay for some suitable alternative that meets the basic dimensions. 
Perhaps you could let us know how you get on. 
Kind regards,

Gareth.